4SQRP Bayou Jumper 40 Meter CW Transceiver, Руководство по сборке и инструкция

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revised 3 Feb 2021 Bayou Jumper revB Assembly Manual page 18 of 46
The RED anode lead should be soldered to the pad marked RED, which already
has one lead of R19 attached.
The GREEN anode lead should be soldered to the pad marked GREEN, which
holds a lead of R20.
The cathode lead should be soldered to the GND pad.
□
Locate the 12” jumper wire supplied in the
kit
– the one with a header socket at each end.
Cut the wire in half, then strip about 1/8” of
insulation from each cut end, and tin the
exposed wires with solder.
Solder one wire to the RxVcc pad on the
underside of the front panel, and the other to
the J7-7 pad. It would be a good idea to use a
bit of tape, or perhaps hot glue, to provide
some strain relief for these wires.
When the front panel is mated to the main PC board the socket ends of these
wires will be plugged into header pins on the main board:
the wire from pad J7-7 will plug into the J7-7 pin.
the wire from pad RxVcc will plug into the J7-9 pin (NOT the RxVcc pin)
The sockets on the ends of the two connecting wires are just a bit too tall to fit between the front panel
and the main board when they are plugged into the header pins.
To make room, remove the little plastic spacer on each
of the pins J7-7 and J7-9. Just grasp the plastic spacer
with your long nose pliers and pull straight up. The
plastic part will slide off. The photos show how
.
Here’s how the bi-color LED indicator works:
When the transceiver is in Tx mode, 12 V is supplied to pin J7-7 through SW1a.
J7-7 is connected through R19 to the RED anode of LED D4. Diode D1 serves to isolate pin J7-9 from
the 12 V supply. Therefore the RED portion of D4 will be illuminated in Tx mode.
When the transceiver is in Rx mode, 12V is supplied to pin J7-9 directly through SW1a, and is also
connected to J7-7 through diode D1. Now 12 V is being supplied through R20 to the GREEN anode of
D4. So during Rx mode the GREEN portion of D4 will be illuminated, in addition to the RED.
The GREEN portion of D4 is more efficient than the RED, and the human eye is more sensitive to
the green portion of the visible spectrum, so the green light overpowers the red, and the indicator
appears green.
If R20 were to be increased to about 24K to reduce the intensity of the green, the green light would
roughly balance the red and the colors would mix to appear yellow/amber.